Master key

Alternate leaves

.........parallel venation (Poaceae)

.........three parallel veins (Cinnamomum)

.........feather like venation

..............Bark with resin (Dipterocarpaceae)

..............Bark with white-yellow sap (Calophyllaceae, Clusiaceae, Hypericaceae)

....................Clasping leaf base over the twig tip (Clusiaceae)

....................No clasping leaf base (Calophyllaceae, Hypericaceae)

........................Many close parallel veins (Calophyllum)

........................Normal pinnate venation type (Mesua, Hypericaceae)

.............................Transparent dots on leaves present (Hypericaceae - Cratoxylum)

.............................Transparent dots absent (Mesua)

..............Bark without resin

....................Stipules present (Castanopsis, Lithocarpus, Quercus)

....................Stipules absent

Opposite leaves (Calophyllaceae, Clusiaceae, Hypericaceae, Duabanga, Syzygium, Cinnamomum)

.......Colourless sap (Duabanga, Syzygium, Cinnamomum)

..............three parallel veins (Cinnamomum)

..............featherlike venation (Duabanga, Syzygium)

.....................black glands at the base of leaf stalk, persistent flower parts at base of fruit,

.....................fruit dry (Duabanga)

.....................No glands at the base of the leaf stalk, persistent flower parts on top of fruit,

.....................fruit fleshy (berry) (Syzygium)

4b. White-yellow sap (Calophyllaceae, Clusiaceae, Hypericaceae)

5a. Clasping leaf base over the twig tip (Clusiaceae)

5b. No clasping leaf base (Calophyllaceae, Hypericaceae)

6a. Many close parallel veins (Calophyllum)

6b. Normal pinnate venation type (Mesua, Hypericaceae)

7a. Transparent dots on leaves present (Hypericaceae - Cratoxylum)

7b. Transparent dots absent (Mesua)